Catalina - coupons for $$ off your next purchase that print out alongside your receipt at the register.Stack - use two coupons together. For example, Walgreens allows you to use a Walgreens store coupon with a manufacturers coupon on the same item.Peelies - coupons you find on the product itself (peels off)Blinkies - sm coupon machines found in many stores that spit out coupons. They have a blinking light, hence the name.Hangtags - just what it sounds like. Coupon is on a tag that hangs from the product.Tearpads - just what it sounds like. Usually tearpad coupons hang on shelves near the product.